Radiator



Dec. 4, 1928.

D. T. M LEOD RADIATOR Filed April 25, 1927 Patented Dec. 4, 1928.

UNITED S A.

DANIEL T. MACLEQD, OF RACINE, WISCONSIN, ASSIGNOR TO ,PERFEX CORPORATIONQ rear FFIQE OF RACINE, 'WISCON$IN, A CORPORATION OF WISCONSIN.

' RADIATOR.

Applifcationfiled April 25, 1927. .Serial no. 186,306.

more uniform distribution of the flow of cooling medium through the radiator; to provide an improved arrangement of radiator core sections; and to provide an improved form of tubular radiator wherein the water is caused to pass twice through the current of air induced by the tan thus forming .a multiple pass radiator.

An illustrative embodiment ofthe invention shown in the accompanying drawings wherein Fig. l is a front elevation ofa sectional radiator for automobiles. i

v Fig. 2 is a side cle 'ation thereof.

Fig. 3 is a sectional'detail of a modified form of header tank.

The least effectve cooling area of radiators for internal combustion engines is in the center of the core section. This is dueto the fact that the fan does not draw the air with as much velocity at the centervot the core section as .it does nearer the outside of the core section. Furthermore, the engine block creates a back pressure Wl1-1Cl1 establishes air eddies.

In the usual forms of radiators, the water intake is throughthe upper hose connection secured to the upper header near its middle portion and the outlet is through the lower hose connection secured to the lower header near its middle portion. As the water is circulated by the water pump, a current'is established between the intake and outlet hose connections and thus naturally follows the line of least resistance and most of the circulating water flows through the central portion or the core where the air currents are least effective. 7 v

In the herein described invention increased cooling eiiiciency is obtained by subdividing the core into two or more main sections each made up of multiple units and arranging the inlet and outlet and the'communica'ting pas-- sages so that the current of water is caused to flow more uniformly through each ot' the several core units. This'is accomplished by having-inlets in the upper headers of each main section adjacent opposite c )rners-thereof and outlets in their respective lower headers adjacent the corners diagonally opposite their respective inlets. A'eonduit at the side or" the intake of one header and the ,outlet'at the side of the other header providescommunication between the lower header of one main section and the upper header of the other main section. 1 In this manner, a great er volume of the water is caused to pass through-the side-portionsof themainsections which portions arethe. most eiiiciently cooled.

In the construction shown, an upper header 1 is either. divided into twocompartnifcntsQ and 3 by a longitudinally disposed wall l shown in Fig. 8, or there may be two separate Thehomcompartments as shownin Fig. 2.

partments 21 and :3 of the upperheader 1 are provided with filler .nec S5, communicating with the mterlor thereof for filling the radiatorwlth water.v The filler neck as screwthreaded for attaching a closure cap 6. A

lower header 7 is similarlydivided into two separate compartments 8 and 9 which may likewise be of the integral typeas shown in Fig. .3. Y

A plurality otvertically disposed radiator core units ll are secured interchangeably .between theupper and lower headers by bolts 12 and provide communication between the upper compartment 2 and the lower compartment 8. -Apl urality of similar core units 13 provide communication between the compartment 3 of the upper header andthe compartment 9 of the :lower header and to which they are secured by bolts 12.3 Side frame members 14 are secured between the upper and lower headers to provide for structural strength and rigidity. 7

Water from the engine is the radiator through an upper hose connection pipe 15, and elbow 16 whi h communi cate with the compartment- 3 of the upper headerl. Compartment 8 ofthe lower header is similarly connected with the lower hose connection, not showm'by a pipe 17 and an elbow 18, providing the water outlet on'the same side of the radiator as theinlet.

The two multiple unit core sections, front and rear as indicated by the letters F and P communicate mutually through an upright, slightly inclined conduit or pipe 19 which is On the side of the radiator opposite the-inlet and outlet hose connections and extends from discharged into i IIU I partment 2 ofthe upper header, or one of the side frame members 14L may be constructed to provideea conduitbetwecnthe several core The lower end of communicating plpe or conduit 19 connects with the compartsections.

ment 9 in the lower header through an elbow 20 to which it is'threaded and a pipe nipple 21 screwed in a threaded port in thewall of said compartment. The upper end of the conduit 19 connects with the compartment 2 in the upper header through a similar connection comprising a 21 and a union 25. I I

The arrows indicate thegeneral direction of this more uniform flow of the cooling medium through the several radiator sections and core units. It will be observed that the flow of water entering the intake is through the compartment 3 downward through the pipe nipple 23, elbow core units 13 of section B to the compartment 9 from which it flows upwardly through the pipe 19 to the compartment 2 and thence downward through the core units 11 of sec tion F to the compartment 8 and out through the outlet pipe 17 to the lower hose connection. It will therefore be seen that the circulating water in its flow through the two radiator core sections R and F and their respective core units 13 and 11 will be cooled more efficiently than in structures now in common use inasmuch as a greater volume is caused to pass through those portions of the radiator which are the most efliciently cooled.

While but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted without departing from the'spirit of this invention as defined by the following claims.

I claim:

, 1. In a heat interchanger, a pair of similar core sections disposed one behind the other relatively to the direction of air flow and in substantially close set relation and fluid conducting means connecting the lower portion of one core section and the upper portion of the other core section.

2. In a heat interchanger, a pair of similar core sections disposed one behind the other relatively to the direction of air flow, a top h-eader'and a bottom header common to said core sections, and a conduit connecting said headers for providing communication between the lower portion of the rear core section and the upper portion of the front core section, said headers each having compartments for said core sections respectively.

3. In. a heat interchanger, a pair of core sections disposed one behind the other rela tively to the direction of air flow, top and bottom header means therefor, an intake means'for the upper portion of one core section adjacent one side thereof, an outlet means for the lower portion of the other core section adjacent the same side, and a conduiton the side. opposite from the inlet and outlet means leading from. the lower header of the core section having the intake tot-he upper header of the core section having the outlet.

4. In a heat interchanger, a pair of corev ,5. In a heat interchanger, heat transfer meanshaving several similar parts exposed 1n succession to the same airflow, and a co-n dult for providing series flow communication between the bottom positioned outlet portion of one part and the top positioned inlet portion of another part, whereby the same water will traverse said parts successively and in the same direction.

6. In a heat interchanger, a coresection having several similar parts exposed in succession to the same air flow, divided common headers whose several divisions each communicate respectively with different core parts, and a conduit'for providing series flow communication between the bottom outlet portion of one part and the topinlet portion of another part, whereby the same water will traverse said parts successively.

7 In a heat interchanger, heat transfer means having several parts exposed to the same air flow, divided integral headers" whose several divisions each communicate respectively with different'core parts and aconduit for providing communication between the outlet portion of one part and the inlet portion of anotherpart, whereby the same water will traverse said parts successively. I

8. A radiator for internal combustion engines, comprising heat transfer means including a pair of similar core sections disposed one behind the other relatively to the direction of air flow, upper and lower headers for the core sections, and a conduit for providing series 'communicationbetween the lower header of one core section and the'upper header'ofthe other core section, and also downward movement of fluid in both of said A,

core sections. 1QS jgned at Chicago this 21st day of April,

DANIEL T. M cLEOD. 

